This old version of Proteopedia is provided for student assignments while the new version is undergoing repairs. Content and edits done in this old version of Proteopedia after March 1, 2026 will eventually be lost when it is retired in about June of 2026.

Apply for new accounts at the new Proteopedia. Your logins will work in both the old and new versions.

1y1a

From Proteopedia

(Difference between revisions)

Jump to: navigation, search

Revision as of 10:29, 6 January 2021

CRYSTAL STRUCTURE OF CALCIUM AND INTEGRIN BINDING PROTEIN

Structural highlights

1y1a is a 2 chain structure with sequence from Human. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:	,
Gene:	CIB1 (HUMAN)
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[CIB1_HUMAN] May convert the inactive conformation of integrin alpha-IIb/beta3 to an active form through binding to the integrin cytoplasmic domain. Induces cell migration and spreading mediated through integrin (possibly via focal adhesion complexes). Functions as a negative regulator of stress activated MAP kinase (MAPK) signaling pathways. May play a role in regulation of apoptosis. Interacts with and up-regulates PTK2/FAK1 activity. Down regulates inositol 1,4,5-trisphosphate receptor-dependent calcium signaling. Participates in endomitotic cell cycle, a form of mitosis in which both karyokinesis and cytokinesis are interrupted and is a hallmark of megakaryocyte differentiation.^[1] ^[2] ^[3] ^[4] ^[5] ^[6]

Evolutionary Conservation

Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.

Publication Abstract from PubMed

Calcium- and integrin-binding protein 1 (CIB1) is involved in the process of platelet aggregation by binding the cytoplasmic tail of the alpha(IIb) subunit of the platelet-specific integrin alpha(Iib)beta(3). Although poorly understood, it is widely believed that CIB1 acts as a global signaling regulator because it is expressed in many tissues that do not express integrin alpha(Iib)beta(3). We report the structure of human CIB1 to a resolution of 2.3 A, crystallized as a dimer. The dimer interface includes an extensive hydrophobic patch in a crystal form with 80% solvent content. Although the dimer form of CIB1 may not be physiologically relevant, this intersub-unit surface is likely to be linked to alpha(IIb) binding and to the binding of other signaling partner proteins. The C-terminal domain of CIB1 is structurally similar to other EF-hand proteins such as calmodulin and calcineurin B. Despite structural homology to the C-terminal domain, the N-terminal domain of CIB1 lacks calcium-binding sites. The structure of CIB1 revealed a complex with a molecule of glutathione in the reduced state bond to the N-terminal domain of one of the two subunits poised to interact with the free thiol of C35. Glutathione bound in this fashion suggests CIB1 may be redox regulated. Next to the bound GSH, the orientation of residues C35, H31, and S48 is suggestive of a cysteine-type protein phosphatase active site. The potential enzymatic activity of CIB1 is discussed and suggests a mechanism by which it regulates a wide variety of proteins in cells in addition to platelets.

The crystal structure of calcium- and integrin-binding protein 1: insights into redox regulated functions.,Blamey CJ, Ceccarelli C, Naik UP, Bahnson BJ Protein Sci. 2005 May;14(5):1214-21. PMID:15840829^[7]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Naik UP, Naik MU. Association of CIB with GPIIb/IIIa during outside-in signaling is required for platelet spreading on fibrinogen. Blood. 2003 Aug 15;102(4):1355-62. Epub 2003 Apr 24. PMID:12714504 doi:10.1182/blood-2003-02-0591
↑ Naik MU, Naik UP. Calcium-and integrin-binding protein regulates focal adhesion kinase activity during platelet spreading on immobilized fibrinogen. Blood. 2003 Nov 15;102(10):3629-36. Epub 2003 Jul 24. PMID:12881299 doi:10.1182/blood-2003-05-1703
↑ Tahara E Jr, Tahara H, Kanno M, Naka K, Takeda Y, Matsuzaki T, Yamazaki R, Ishihara H, Yasui W, Barrett JC, Ide T, Tahara E. G1P3, an interferon inducible gene 6-16, is expressed in gastric cancers and inhibits mitochondrial-mediated apoptosis in gastric cancer cell line TMK-1 cell. Cancer Immunol Immunother. 2005 Aug;54(8):729-40. Epub 2005 Feb 1. PMID:15685448 doi:10.1007/s00262-004-0645-2
↑ Hennigs JK, Burhenne N, Stahler F, Winnig M, Walter B, Meyerhof W, Schmale H. Sweet taste receptor interacting protein CIB1 is a general inhibitor of InsP3-dependent Ca2+ release in vivo. J Neurochem. 2008 Sep;106(5):2249-62. doi: 10.1111/j.1471-4159.2008.05563.x. PMID:18627437 doi:10.1111/j.1471-4159.2008.05563.x
↑ Yoon KW, Cho JH, Lee JK, Kang YH, Chae JS, Kim YM, Kim J, Kim EK, Kim SE, Baik JH, Naik UP, Cho SG, Choi EJ. CIB1 functions as a Ca(2+)-sensitive modulator of stress-induced signaling by targeting ASK1. Proc Natl Acad Sci U S A. 2009 Oct 13;106(41):17389-94. doi:, 10.1073/pnas.0812259106. Epub 2009 Sep 29. PMID:19805025 doi:10.1073/pnas.0812259106
↑ Kostyak JC, Naik UP. Calcium- and integrin-binding protein 1 regulates endomitosis and its interaction with Polo-like kinase 3 is enhanced in endomitotic Dami cells. PLoS One. 2011 Jan 14;6(1):e14513. doi: 10.1371/journal.pone.0014513. PMID:21264284 doi:10.1371/journal.pone.0014513
↑ Blamey CJ, Ceccarelli C, Naik UP, Bahnson BJ. The crystal structure of calcium- and integrin-binding protein 1: insights into redox regulated functions. Protein Sci. 2005 May;14(5):1214-21. PMID:15840829 doi:14/5/1214

1 Structural highlights
2 Function
3 Evolutionary Conservation
4 Publication Abstract from PubMed
5 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/1y1a"

@@ Line 1: / Line 1: @@
 ==CRYSTAL STRUCTURE OF CALCIUM AND INTEGRIN BINDING PROTEIN==
-<StructureSection load='1y1a' size='340' side='right' caption='[[1y1a]], [[Resolution|resolution]] 2.30&Aring;' scene=''>
+<StructureSection load='1y1a' size='340' side='right'caption='[[1y1a]], [[Resolution|resolution]] 2.30&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[1y1a]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Human Human]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1Y1A OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1Y1A FirstGlance]. <br>
+<table><tr><td colspan='2'>[[1y1a]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Human Human]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1Y1A OCA]. For a <b>guided tour on the structure components</b> use [http://proteopedia.org/fgij/fg.htm?mol=1Y1A FirstGlance]. <br>
-</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=GSH:GLUTATHIONE'>GSH</scene></td></tr>
+</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=GSH:GLUTATHIONE'>GSH</scene></td></tr>
 <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">CIB1 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 HUMAN])</td></tr>
-<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1y1a FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1y1a OCA], [http://pdbe.org/1y1a PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1y1a RCSB], [http://www.ebi.ac.uk/pdbsum/1y1a PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1y1a ProSAT]</span></td></tr>
+<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://proteopedia.org/fgij/fg.htm?mol=1y1a FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1y1a OCA], [http://pdbe.org/1y1a PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1y1a RCSB], [http://www.ebi.ac.uk/pdbsum/1y1a PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1y1a ProSAT]</span></td></tr>
 </table>
 == Function ==
@@ Line 34: / Line 34: @@
 </StructureSection>
 [[Category: Human]]
+[[Category: Large Structures]]
 [[Category: Bahnson, B J]]
 [[Category: Blamey, C J]]

1y1a

From Proteopedia

Revision as of 10:29, 6 January 2021

CRYSTAL STRUCTURE OF CALCIUM AND INTEGRIN BINDING PROTEIN

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

Personal tools

Navigation

Search

Toolbox